Questions & Answers about Morgunninn er rólegur.
Morgunninn is the subject of the sentence. It appears in the nominative case because subjects in Icelandic take the nominative. More specifically, it is singular definite nominative:
• singular – one morning
• definite – “the” morning
• nominative – marks the subject
The suffix -inn is the masculine singular definite article in Icelandic. Instead of a separate word the, Icelandic attaches the article to the noun:
• morgunn = morning (indefinite)
• morgunninn = the morning (definite)
Morgunninn is a masculine noun. You can tell because:
• It takes the masculine definite suffix -inn
• Adjectives modifying it must appear in masculine form